Evaluation of Technology for the Recovery of Metallurgical-Grade Alumina From Coal Ash.

摘要

The Bureau of Mines has reviewed the literature related to the recovery of Al2O3 (alumina) from coal ash. A small amount of unpublished data is also reported. Of the processes studied,the alkaline-sinter process is the most promising from a technical standpoint. However,owing to the high cost of processing coal ash,the dispersed location of powerplants,and the domestic availability of higher grade alternate materials,coal ash does not rank as a primary source material for replacing imported bauxite.